//
// Microsoft.Win32.SafeHandles.SafeHandleMinusOneIsInvalid
//
// Author
//	 Zoltan Varga (vargaz@gmail.com)
//       Miguel de Icaza (miguel@novell.com)
//
// Copyright (C) 2005, 2006 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

#if NET_2_0

using System;
using System.Runtime.InteropServices;
using System.Runtime.ConstrainedExecution;

namespace Microsoft.Win32.SafeHandles {

	public abstract class SafeHandleMinusOneIsInvalid : SafeHandle, IDisposable {
		[ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
		protected SafeHandleMinusOneIsInvalid (bool ownsHandle) : base ((IntPtr) 0, ownsHandle) {
		}

		public override bool IsInvalid {
			get {
				return handle == (IntPtr)(-1);
			}
		}
	}
}

#endif
